LED微阵列器件具有体积小、分辨率高、寿命长及耗能低等突出特点。出光效率是该器件的一项重要参数,文中对以AlGaInP外延片为基片的LED微阵列器件的出光效率进行了理论及实验研究。器件的像素周期设计为100 μm×100 μm, 发光单元间的上隔离沟槽宽度为20 μm、深度为25 μm,将在600~650 nm波段具有高反射率的均匀掺单晶硅纳米颗粒的聚酰亚胺作为复合材料来填充上隔离沟槽,将侧面出射的光反射到上表面,实现了相邻两个发光单元之间的光学和电学隔离。分析计算表明,通过填充硅纳米颗粒/聚酰亚胺复合膜材料,使每个发光单元侧面出射光的16.695%反射回窗口层,提高了出光效率。这项研究将有助于提高LED微阵列器件的出光效率。

LED micro-arrays apparatus has many outstanding characteristics, such as small bulk, high resolving power, long life, low wear out power and so on. Lighting output efficiency is an important parameter. The text made theoretic and experiment study for LED micro-arrays apparatus on AlGaInP wafer. The arrays apparatus image sizes is 100 μm×100 μm. Etching upper isolating groove with the deep width ratio was 25 μm∶20 μm between adjacent light-emitting unit. Then filling the groove with mixed Si granule that has high reflect to 600~650 nm wave band into polyurethane. This hybrid materials can reflect lateral light to above surface, not only improve light efficiency of micro arrays apparatus, but also realize light and electric seclusion of two adjacent light-emitting unit. Theoretical calculation indicate that the multiple film can reflect each light-emitting unit the light of side-wall 16.695% to window layer, it improves lighting output efficiency availably. The study administers to the improvement of lighting output efficiency for LED micro-arrays apparatus.